TW200535500A - Liquid crystal display panel - Google Patents

Abstract

The present invention relates to a liquid crystal display panel, which includes a first substrate, a liquid crystal layer, a sealant layer, and a second substrate arranged in order. The first substrate has a color filter layer thereon, and a photo spacer array is disposed on the color filter layer for supporting the substrates. The first and second substrates are adhered to each other by the sealant layer, thus dividing the first substrate into two parts, i.e., an interior and an exterior parts. The photo spacer array is arranged discretel y at the interior and exterior parts of the first substrate, respectively. A distributive density of the photo spacer array near the interior sealant layer is lager than a distributive density of the photo spacer array far away from the interior sealant layer.

Description

200535500 V. Description of the invention ii) [Technical field to which the invention belongs] The present invention relates to a liquid crystal display panel ', and more particularly, to a liquid crystal display panel provided with a photo spacer (P h 〇 t 〇 S p a c e r). [Prior art] A liquid crystal display panel usually includes two opposite substrates, which are separated by a spacer (S pacer) to form a space (C e 1 1 G ap) for filling the liquid crystal. The purpose of using the spacer is to maintain The distance between the two substrates is constant, so that the thickness of the liquid crystal panel is uniform. The contrast ratio is maintained, and the spacers, composites, and other spacers on the substrate are unfavorable due to pollution and dry spread to the base tape. The repellent effect is wide on the 16th. The thickness of the liquid crystal is normal and liquid. Among them, the solvent and the element are evenly divided: the method easily causes the surface of the main 4 board to be electrically charged, and the day when the cells are dispersed, the liquid crystal and the like display uniformity, and the surface crystal display is displayed. The wet separator is then used to distribute the fluorine to the base gauge. Fire, system use. Spread the spacer particles, so the present invention's display panel 均匀 π is still uniform liquid crystal, so there is a major film is sprayed with a wet dispersion spray such as Freon to the spacer wet set, organic beat or nitrogen After the friction is electrified, it will be removed from the substrate table 0 1 0 5 4 2

Page 7 Features, even the display performance of liquid crystal laminates Panel spacers are mainly used to disperse into the solvent, and the spray device will dissolve the surface of the panel. However, the limits of Leon's prohibition of solvents on the alignment film gas, such as before compression, are usually sprayed on the substrate to the substrate to be able to spread more evenly. Application of JP-A-10 ~ spacer effect. It is produced by dry spraying, alcohol or water ~ s substrate surface, and the system is made with / grain agent to cause ring pollution. 'The spacer is directly, so that the spacer is charged to the same side of the surface. Shown in 1998:-Seed field 200535500 V. Description of the invention (?) A method for spraying spacers. The spacers used in this method include spacer particles and fine particles adhered to the surface of the spacer particles. The fine particles can improve the spacer. This improves the uniformity of the spacers distributed on the substrate surface. Both the dry type and the wet type use the spray-type spacer process. The uniformity of the distribution density is difficult to control, and it is easy to cause unevenness of the spacer density and affect the flatness of the liquid crystal panel. In addition, the spacer is generally made of a bead material made of silica particles or styrene polymer particles. The bead material damages the alignment performance of the alignment film, and the bead portion of the bead material easily leaks light and affects the liquid crystal display. The contrast of the panel. 5% 〜1. Another prior art when manufacturing a liquid crystal display panel, an appropriate amount of spacers (R 〇d Spacer) is added in a frame adhesive for bonding the liquid crystal display panel to the lower and upper substrates, and its mass percentage is about 0.5% to 1. 5% is used to support the panel and control the distance between its periphery. The material of this spacer is mostly glass fiber or silicate. After mixing with the frame adhesive, it needs to be adjusted. If the dripping method (0DF, One Drop Fi 1 1) is used, the liquid crystal molecules will directly contact the uncured frame adhesive, which may cause the liquid crystal to be contaminated by the free small molecules of the frame adhesive, directly affecting the quality of the panel, The problem of uneven mixing is prone to occur during the manufacturing process. At present, the industry has developed spacers that can replace beaded spacers, mainly using photolithographic processes to form optical spacers directly on the surface of color filter layers. As shown in the first figure and the second figure, a liquid crystal panel disclosed by Taiwan Patent No. 5 07,05 published on October 21, 2002, and a manufacturing method thereof. The liquid crystal panel includes an upper substrate 1 71 and a lower substrate opposite to each other.

200535500 Description of the invention (3) 1 7 9 wherein the upper substrate 1 7} includes a color pixel region 1 7 4, a black matrix layer 1 7 5_ and a light spacer 1 7 6 sighed between the two substrates, and the lower substrate 1 7 9 includes a frame adhesive 177 for bonding the two substrates 171 and 179. In the manufacturing process, the lower substrate 179 is first dripped with liquid crystal 178, and then the upper and lower substrates 171 and 179 are aligned and bonded, and the liquid is reversed. The frame adhesive 1 7 is used to attach and support the upper and lower substrates. 1 7 1 and 1 9 9 surround the liquid crystal panel to limit the liquid crystal 1 7 8 frame to the two substrates 7 1 and 1 7 9, and the photo spacer 176 is used to separate the upper and lower substrates 1 71 and 179. It can be directly produced through the photolithography process in the manufacturing process of the color filter layer 188, eliminating the process of spraying cloth or adding spacers in the frame, thereby simplifying the cost of materials. , Π 077, but when the upper and lower substrates 1 7 1 and 1 7 9 are bonded, they are often radiated with UV light (U 11 ra V i ο 1 et, hereinafter referred to as UV light) to harden it. When irradiated from the 17m side of the dead substrate, part of the UV light will be blocked by the black matrix layer 175 ', which will cause the curing speed of the frame rubber 1 77 to be slower and insufficiently hardened, resulting in ", uncured frame rubber 1 7 7 pollution To the liquid crystal 17.8. In addition, if UV light is irradiated to the sealant from the side of the lower substrate 1 179, part of the light will be blocked by the & path (not yet) on the lower substrate 179, which also causes Part of the frame adhesive 1 77 is insufficiently hardened, resulting in " uncured frame adhesive 177 contaminating the liquid crystal 178. In the end, it adversely affects the display characteristics of the liquid crystal panel.

For this reason, it is necessary to provide a liquid crystal display surface having excellent display characteristics. Double I [Content of the invention] The object of the present invention is to provide a liquid crystal display with excellent display characteristics ~

200535500

5. Description of the invention (4) Panel.

The liquid crystal display panel of the present invention includes a first substrate, a first substrate, a liquid crystal layer, a frame adhesive, a color filter layer, and an optical spacer array. The second substrate is disposed opposite to the first substrate, the liquid crystal layer is disposed between the first substrate and the second substrate, and the frame is bonded to the first substrate and the far second substrate to distinguish the first substrate into one. The central portion and a peripheral portion, the color filter layer is disposed on a surface of the first substrate opposite to the second substrate, and the optical spacer array is discretely distributed on the surface of the color filter layer. The optical spacer array is disposed at a central portion and a peripheral portion of the first substrate, and the distribution density of the optical spacer array near the central portion of the frame is greater than the distribution density of the optical spacer array at the central portion away from the frame.

Compared with the prior art, the liquid crystal display panel of the present invention includes the following advantages. First, because the optical spacer array is disposed inside and outside the frame, respectively, the distance between the first substrate and the second substrate 1 can be controlled so that the thickness of the liquid crystal display panel is uniform. Second, the optical spacer array is discretely distributed. The solid structure is light in weight and can enhance the stability of the supporting two substrates; again, when bonding after dripping the liquid crystal, the Haiguang spacer array is near the frame rubber at the central part = the degree of knife cloth is large, which can delay The contact between the uncured frame adhesive of the LCD and the hardened frame adhesive is sufficient to reduce the contact area between the liquid crystal and the second cured frame adhesive. The display panel has good display characteristics. [Embodiment] As shown in the first figure, the cross-section of the liquid crystal display panel of the present invention is not intended in the first and second embodiments. The liquid crystal display panel 10 includes a first substrate 11 and

200535500 V. Description of the invention A second substrate 19 and a frame adhesive 18, wherein the first substrate 丨 is opposite to the second substrate 19, and a liquid crystal layer 17 is disposed therebetween. The frame adhesive 18 is disposed between the first substrate Π and the second substrate 丨 9 to closely adhere the first substrate 丨 and the second substrate 19. The frame adhesive 18 surrounds the liquid crystal display panel 丨 〇, which blocks the liquid crystal molecules from the outside and the frame is limited between the first substrate 丨 and the second substrate 〖9 'The frame adhesive 1 8 uses acrylic resin and epoxy resin The mixture is a material. Looking at the fourth picture together, the first substrate 11 is a substrate on which the color filter layer 丨 2 3 is located, and the surface opposite the second substrate 丨 9 is coated with a frame adhesive 丨 8, and the frame adhesive 1 8 will be The surface of the first substrate 1 is divided into a central portion and a peripheral portion 120 located on the central portion 110 and the periphery. The central portion 110 is a display area of the liquid crystal panel 10. The central part Π 〇 of the first substrate 11 includes one of the three primary color coloring units r, 〇, and b in sequence, a black matrix layer 12, and a transparent conductive film. The black matrix layer 12 and the three primary coloring units 丨 3 The phases are arranged at intervals and alternately arranged on the first substrate 11 to isolate the R, G, and B primary coloring units 13 and the light beam, so that the liquid crystal display panel has high contrast and sharpness, and can be made of resin material. Transparent The conductive film 4 covers the surface of the matrix layer 12 and the colored sheet 1 3. The photo spacer array 5 discretely 1 = the central portion 11 and the outer portion 120 of the first substrate 11, and the photo spacer row The distribution density of 15 at the central portion 110 adjacent to the frame rubber 18 is greater than its distribution density at 110 away from the frame rubber 18. The two substrates are laminated on the periphery of the black matrix layer i 2 according to the situation, and the frame rubber i 8 The ^ root can also overlap or partially overlap with the position of the black matrix layer 12. The process of the -substrate 11 includes the following steps: First, the array layer 12 is etched on a glass substrate (not labeled) to form Prevent coloring sheet =

200535500 V. Description of the invention (6) 1 3 Mixed color black shading frame, followed by repeating the application, exposure and development of R, G, B three photoresistors in each pixel; then coating a layer of transparent conductive film 1 4 Thus, a color filter layer 1 2 3 is formed; finally, a negative acrylic resin is formed on the transparent conductive film 14 and the edge of the glass substrate into discretely distributed optical spacer arrays 1 using a light lithography process (Li thography process). 5. It is used to separate the first substrate 11 and the second substrate 9. The optical spacer array 15 is at the same horizontal plane as the inner surface of the second substrate 19, which includes a first optical spacer array 1 5 1, a second optical spacer array 15 2 and A third optical spacer array 153 at the peripheral portion 120. The second photo-spacer array 15 2 is discretely and equally spaced adjacent to the frame 18, and its spatial structure is cylindrical or semi-circular cylindrical. The setting position corresponds to the position of the black matrix layer 丨 2, and may also partially overlap the position of the black matrix layer 12. The distribution density of the second photo spacer array 丨 5 2 is relatively high. In the liquid crystal dropping process, it is sufficient to delay the contact time of the liquid crystal layer 丨 7 through the contact time with the frame adhesive 18 to fully harden the frame adhesive 丨 8 and reduce the liquid crystal layer. The contamination of j 7 'prevents the phenomenon that the frame adhesive 18 penetrates into the display area and causes the liquid crystal display panel 1 to leak light', thereby ensuring that the liquid crystal display panel 10 has good display characteristics. The first optical spacer array 丨 5 1 is discretely distributed at the center 丨 〇 so that the distance between the two substrates 1 1 and 19 is constant. The distribution density of the first optical spacer array 丨 5 i is smaller than the second optical interval. Distribution density of the object array 5 2. In addition, an alignment film 16 is coated on the surfaces of the photo spacer arrays 151 and 152. The third photo-spacer array 15 3 is discretely distributed at the outer portion 丨 20 of the first substrate 丨. Its spatial structure is cylindrical, and it is evenly spaced around the outside of the frame 18. Third photo spacer

200535500 V. Description of the invention (7) Array 1 5 3 and second optical spacer array 1 5 2 —and support the two substrates 1 1 and 19 so that the distance between the edges of the LCD panel 10 is kept constant. The second substrate 19 is a thin film transistor (TFT) substrate and includes a TFT layer (not shown) for driving the liquid crystal layer 17 to control whether the light beam passes or not.

As a variation of this embodiment, the color filter layer 1 2 3 of the liquid crystal display panel 10 and the first substrate 1 1 may not have the black matrix layer 12, and only includes one R, G, and B primary coloring units 13. The photo spacer array 15 is formed between adjacent coloring units 13 and has a size capable of covering a gap portion between two adjacent photoresists. At this time, the photo-spacer array 15 needs to be made into an opaque body, which is disposed at the position of the black matrix layer 12 and can replace the black matrix layer 12 to realize the characteristics of preventing photoresist color mixing and improving contrast. Please refer to the fifth figure, which is a schematic cross-sectional view of a second embodiment of a liquid crystal display panel of the present invention. This embodiment differs from the first embodiment in that a strip of light spacer protrusions 2 9 9 can be further provided at the second light spacer array 252 of the central portion 210 of the liquid crystal display panel 20. The photo-spacer protrusions 2 9 9 are rectangular as a whole and are arranged parallel to the frame 28. The strip-shaped photo-spacer protrusions 2 9 9 are also distributed discretely, and the distribution density is higher than that of the second photo-spacer array.

The distribution density of 2 5 2 is higher, which can further prevent the contact pollution between the uncured frame adhesive 28 and the liquid crystal layer 27, and the display characteristics are better. Please refer to FIG. 6, which is a schematic cross-sectional view of a third embodiment of a liquid crystal display panel of the present invention. This embodiment is different from the first embodiment in that the distribution density of the third optical spacer array 3 5 3 of the liquid crystal display panel 30 is greater than the distribution density of the first optical spacer array 3 5 1 and is different from that of the second light. Spacer array

Page 13 200535500 V. Description of the invention (8) The distribution density of column 3 5 2 is equivalent. Please refer to FIG. 7, which is a schematic cross-sectional view of a fourth embodiment of a liquid crystal display panel of the present invention. This embodiment differs from the second embodiment in that the distribution density of the third optical spacer array 4 5 3 of the liquid crystal display panel 40 is greater than the distribution density of the first optical spacer array 4 5 1 and is different from that of the second light. The distribution density of the spacer array 4 5 2 is equivalent. Please refer to FIG. 8, which is a schematic cross-sectional view of a fifth embodiment of a liquid crystal display panel of the present invention. This embodiment is different from the first embodiment in that the second optical spacer array 5 5 2 of the liquid crystal display panel 50 includes a fourth spacer array 5 54 disposed adjacent to the frame adhesive 58 and a distance from the frame adhesive 58. The fifth spacer array 5 5 5, wherein the spatial structure of the fourth spacer array 5 5 4 is semi-circular columnar, and the spatial structure of the fifth spacer array 5 5 5 is cylindrical. In summary, the present invention has indeed met the requirements of the invention patent, and a patent application has been filed in accordance with the law. However, the above are only the preferred embodiments of the present invention, and the scope of the present invention is not limited to the above embodiments. For those who are familiar with the technology of this case, equivalent modifications or changes made in accordance with the spirit of the present invention are all It should be covered by the following patent applications.

Page 14 200535500 Brief Description of Drawings The first drawing is a three-dimensional exploded view of a prior art liquid crystal display panel. The second figure is a schematic cross-sectional view of the first liquid crystal display panel. The third figure is a schematic cross-sectional view of the first embodiment of the liquid crystal display panel of the present invention. The fourth figure is a schematic cross-sectional view in the IV-IV direction of the liquid crystal display panel shown in the third figure. The fifth figure is a schematic sectional view of a second embodiment of a liquid crystal display panel of the present invention. The sixth figure is a schematic sectional view of a third embodiment of the liquid crystal display panel of the present invention. The seventh figure is a schematic sectional view of a fourth embodiment of the liquid crystal display panel of the present invention. The eighth figure is a schematic cross-sectional view of the fifth embodiment of the liquid crystal display panel of the present invention. [Description of the main component symbols] Liquid crystal display panel 1 0, 2 0, 3 0, 4 0, 5 0 The first substrate black matrix layer 12 The coloring unit is transparent and conductive Thin film 1 4 Alignment film Liquid crystal layer 1 7, 2 7, 5 7 Second substrate frame adhesive 1 8, 2 8, 5 8 Central color filter layer 1 2 3 Peripheral light spacer protrusion 1 9 9, 2 9 9 Optical spacer array 1 5 11 13 16 19 110, 21 0 120

First photo spacer array 1 5 1, 3 5 1, 4 5 1, 5 5 1

Page 15 200535500

Page 16

Claims (1)

200535500 6. Scope of patent application]. A liquid crystal display panel including: a first substrate; a second substrate disposed opposite the first substrate; a liquid crystal layer disposed between the first substrate and the second substrate A frame adhesive that adheres the first substrate and the second substrate to distinguish the first substrate into a central portion and a peripheral portion; and a color filter layer disposed on the first substrate and the first substrate Opposite surfaces of the two substrates, and the surface of the color filter layer is provided with an array of discretely spaced photo spacers; Wherein, the optical spacer array is disposed at a central portion and a peripheral portion of the first substrate, and a distribution density of the optical spacer array at a central portion adjacent to the frame rubber is greater than a distribution density of the optical spacer array at a central portion away from the frame rubber. 2. The liquid crystal display panel according to item 1 of the scope of patent application, wherein the material of the photo spacer array is acrylic resin. 3. The liquid crystal display panel according to item 1 of the scope of patent application, wherein the photo spacer array is a cylindrical photo spacer array. 4. The liquid crystal display panel according to item 1 of the scope of patent application, wherein the optical spacer array is a semi-circular cylindrical optical spacer array. 5. The liquid crystal display panel according to item 1 of the scope of patent application, wherein the optical spacer array at the central portion adjacent to the frame is a semi-circular cylindrical optical spacer array 歹 lj. 6. The liquid crystal display panel according to item 1 of the scope of patent application, wherein the array of optical spacers on the peripheral portion of the first substrate is cylindrical. 7. The liquid crystal display panel according to item 6 of the scope of patent application, wherein the Page 17 200535500 6. Scope of patent application The distribution density of the optical spacer array at the periphery of a substrate is greater than its distribution density at the center away from the frame. 8. The liquid crystal display panel according to item 1 of the scope of patent application, wherein the light spacer array in the central portion of the first substrate is cylindrical. 9. The liquid crystal display panel according to item 1 of the scope of the patent application, wherein the color light sheet layer includes a black matrix layer and a coloring layer, and the coloring layer includes three primary color red, green, and blue coloring units, wherein the black The matrix layer is spaced from the two primary colors. 10. The liquid crystal display panel according to item 9 of the scope of patent application, wherein the photo spacer array is disposed on the black matrix layer. 1 1. The liquid crystal display panel according to item 9 of the scope of patent application, wherein a position where the photo spacer array is disposed and a position where the black matrix layer partially overlaps. 1 2. The liquid crystal display panel according to item 1 of the scope of patent application, wherein the color filter layer further comprises a transparent protective film. 1 3. The liquid crystal display panel according to item 1 of the scope of patent application, wherein a continuous distributed light spacer protrusion is arranged near the central part of the central part. 1 4. The liquid crystal display panel according to item 7 of the scope of patent application, wherein a continuous distributed light spacer protrusion is provided near the central sealant of the central portion. 1 5. The liquid crystal display panel according to item 13 of the scope of patent application, wherein the protrusions of the optical spacer are rectangular in shape as a whole and are arranged in parallel with the sealant. 16. The liquid crystal display panel according to item 14 of the scope of patent application, wherein the protrusions of the optical spacer are rectangular as a whole and are arranged in parallel with the frame. 1 7. The liquid crystal display panel according to item 9 of the scope of patent application, wherein the frame adhesive Page 18 200535500 6. Scope of patent application Coated on the periphery of the black matrix layer. 1 8. The liquid crystal display panel according to item 9 of the scope of patent application, wherein the position where the sealant is applied and the position where the black matrix layer is located partially overlap. 1 9. The liquid crystal display panel according to item 9 of the scope of patent application, wherein the position where the sealant is applied completely overlaps the position where the black matrix layer is located. ill p. 19